The Guernsey Community Savings has been recommended (a number of times) for its dedication to financial inclusion.

GCS is a non-profit making charitable organisation helping financially excluded Guernsey residents access basic financial services.We are not a bank. Instead, we are able to provide access to accounts for Guernsey residents, referred to us by the local community support agencies, by way of an account opened on the mimoney platform. GCS partners with other charities and public bodies to ensure its widest reach. The case studies to follow will include the Prison, Guernsey Employment Trust (GET), Employment Social security (ESS) and more. 
https://www.gcs.gg
information@gcs.gg